When the leg joints become sore and swollen, the first thing to consider is whether there is chronic inflammation of the soft tissues around the joints, such as synovitis around the joints, bursitis inside the joints, or tendonitis near the joints. Local inflammation can lead to local soft tissue and peri-articular exudate, and once the amount of exudate is high, it can lead to internal pressure changes, resulting in localized soreness and swelling. In addition to inflammation of the soft tissues around the joint, significant inflammatory exudation of the entire joint or injurious exudation of the joint may also cause soreness and swelling of the leg joints. This condition is usually seen in people who have been overworked or have recently been overactive, but inflammatory or injurious exudate from the joint can cause significant localized swelling and may be accompanied by limited movement of the joint.